package it.unibz.inf.ontop.datalog;

/*
 * #%L
 * ontop-obdalib-core
 * %%
 * Copyright (C) 2009 - 2014 Free University of Bozen-Bolzano
 * %%
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 * 
 *      http://www.apache.org/licenses/LICENSE-2.0
 * 
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 * #L%
 */

import it.unibz.inf.ontop.model.term.functionsymbol.Predicate;

import java.io.Serializable;
import java.util.Collection;
import java.util.List;

public interface DatalogProgram extends Serializable {

	List<CQIE> getRules();

	void appendRule(CQIE rule);

	void appendRule(Collection<CQIE> rule);

	/***
	 * Returns all the rules that have the given predicate in their heads
	 * 
	 * @param headPredicate
	 * @return
	 */
	List<CQIE> getRules(Predicate headPredicate);

	MutableQueryModifiers getQueryModifiers();

	DatalogProgram clone();

}
